slow sand filtration system–village of caprivi
DESCRIPTION
Slow Sand Filtration System–Village of Caprivi. Heather Svec, Katie Thompson, Joey Bonavita, and Nate Lisbin. Abstract and Problem Statement:. - PowerPoint PPT PresentationTRANSCRIPT
Heather Svec, Katie Thompson, Joey Bonavita, and Nate Lisbin
The objective of the design project was to design a filtration system to provide Caprivi, Namibia with clean drinking water. In order, to provide clean drinking water for this village, we plan on implementing a slow sand filtration system. Our slow sand filtration system will cost less than $200 and the filter will be able o to be assembled in two days or less. We decided on a slow sand filtration method because it is the most effective filtering system. We have also decided to include an ultraviolet light in the holding tank to eliminate any microorganisms that could be possibly left in the water. With this filtering system, we will bring clean, uncontaminated water to the village of Caprivi, Namibia.
Feature to Improve Contradiction Principles Design Solutions for Principles
Durability Volume of Stationary Object
35 Physical or chemical properties34 Recycling (rejecting and regenerating)38 Strong oxidants
1. Replace the type of plastic used in the tanks and the type of material used in the pipes
2. Use biodegradable materials3. Use a material that will not rust, or break
within a short amount of time
Stability of Object Manufacturability 35 Physical or chemical properties19 Periodic action
1. Use a different type of plastic to make it stronger and more sustainable
2. Be sure to scrape off the sand each week to remove the microorganisms
Reparability Adaptability 7 Nesting dolls1 Segmentation4 Asymmetry16 Partial or excessive action
1. Make the filter collapsible and portable2. Create three different size tanks
accordingly3. Make each tank the same size4. Create a filter for each and every
household
TRIZ Contradiction and Solution Chart:
ReliabilityCost
Efficient
Easy Assembl
y
User Friendly Total Weighting
Reliability 1.00 0.50 0.50 5.00 7.00 0.29
Cost Efficient
2.00 1.00 1.00 4.00 8.00 0.34
Easy Assembly 2.00 1.00 1.00 3.00 7.00 0.29
User Friendly 0.20 0.25 0.33 1.00 1.78 0.07
Pairwise Comparison Chart for Main Objective Categories
Abstract and Problem Statement:
Water is retrieved from Zambezi River
Water is poured into the
first tank
The water goes through the
sand and microorganisms are filtered out
Water passes through gravel
for farther filtering
Water enters the moderator
tank
After draining from the
moderator tank, the water
enters the holding take
with a UV light
Once the water is in the holding
tank, the UV light kills any
remaining contaminants
TRIZ: Figure 5.1 Functional EMS Model
Sustainability Report Above is the cross section of our slow sand filter. We implemented a two tank filter system, consisting of gravel and sand. Above the sand is a diffuser so that the water can be spread evenly across the sand.
To the right is our final product. The top tier is the actual sand filter. Connected by PVC pipe, the second tank is the moderator tank. The final tank is the holding tank where all of the filtered water is held. There is also a UV light in this tank to eliminate any left over microorganisms.